225072918 has 64 divisors (see below), whose sum is σ = 578749440. Its totient is φ = 64297800.

The previous prime is 225072907. The next prime is 225072919. The reversal of 225072918 is 819270522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225072919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26943 + ... + 34293.

It is an arithmetic number, because the mean of its divisors is an integer number (9042960).

Almost surely, 2^225072918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225072918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289374720).

225072918 is an abundant number, since it is smaller than the sum of its proper divisors (353676522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225072918 is an frugal number, since it uses more digits than its factorization.

225072918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7381 (or 7363 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 225072918 is about 15002.4304031047. The cubic root of 225072918 is about 608.2858964616.

It can be divided in two parts, 22507 and 2918, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 225072918 in words is "two hundred twenty-five million, seventy-two thousand, nine hundred eighteen".